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Home >> Pontiac >> 2009 >> Vibe Base, 2.4 0, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 6 (Engine Mechanical - 1.8L (Lay)) >> Repair Instructions - Off Vehicle >> Piston and Connecting Rod Assemble

Piston and Connecting Rod Assemble

WARNING: This page is about a different variant/trim than selected.
    Fig 1: Identifying Piston Pin Snap Ring
    GM2017310Courtesy of GENERAL MOTORS CORP.
    NOTE: Make sure that the end gap of the snap ring is not aligned with the pin hole cutout portion of the piston.
  1. Using a screwdriver, install a new snap ring at one end of the piston pin hole.
  2. Gradually heat the piston to approximately 80-90°C (176-194°F).
    3. Fig 2: Aligning Front Marks Of Piston & Connecting Rod
    GM2017311Courtesy of GENERAL MOTORS CORP.
    NOTE: The piston and pin are a matched set.
  3. Align the front marks of the piston and connecting rod, and push in the piston with your thumb.
    4. NOTE: Make sure that the end gap of the snap ring is not aligned with the pin hole cutout portion of the piston.
  4. Using a screwdriver, install a new snap ring on the other end of the piston pin hole.
    5. Fig 3: Checking For Proper Connecting Rod Movement
    GM2017312Courtesy of GENERAL MOTORS CORP.
  5. Check the fitting condition between the piston and piston pin by trying to move the piston back and forth on the piston pin.
    6. Fig 4: View Of Oil Control Ring
    GM2017313Courtesy of GENERAL MOTORS CORP.
    NOTE:
    • Install the expander and oil ring so that their ring ends are at opposite sides.
    • Securely install the expander to the inner groove of the oil ring.
  6. Install the oil ring expander and oil ring rail by hand.
    7. Fig 5: View Of Proper Compression Ring Installation
    GM2017314Courtesy of GENERAL MOTORS CORP.
    NOTE:
    • Install the compression ring No. 1 with the code mark (A1) facing upward.
    • Install the compression ring No. 2 with the code mark (A2) facing upward.
    • Paint marks can only be checked on new piston rings. When reusing piston rings, check each piston ring profile in order to install them into the correct positions.
  7. Using a piston ring expander, install the 2 compression rings so that the paint marks are positioned as shown in the illustration.
    8. Fig 6: Identifying Proper Piston Ring Positioning
    GM2017317Courtesy of GENERAL MOTORS CORP.
  8. Position the piston rings so that the ring ends are as shown in the illustration.
    9. Fig 7: View Of Upper Bearing Installation (Except No. 3 Journal)
    GM2017318Courtesy of GENERAL MOTORS CORP.
  9. Install the upper bearing (for except No. 3 journal).
  10. Install the upper bearing with an oil groove on the cylinder block.
    11. NOTE: Do not apply engine oil to the bearings or the contact surfaces. Dimension (A): 0.5 to 1.0 mm (0.020 to 0.039 in)
  11. Using a scale, measure the distance between the cylinder block edge and the upper bearing edge.
    12. Fig 8: Identifying Upper Bearing With An Oil Groove On Cylinder Block
    GM2017319Courtesy of GENERAL MOTORS CORP.
  12. Install the upper bearing with an oil groove on the cylinder block.
    13. NOTE: Do not apply engine oil to the bearings or the contact surfaces. Dimension (A - B): 0.5 mm (0.0197 in) or less.
  13. Using vernier calipers, measure the distance between the cylinder block edge and the upper bearing edge.
  14. Install the lower bearing onto the bearing cap.
    15. Fig 9: Measuring Distance Between Bearing Cap Edge & Lower Bearing Edge
    GM2017320Courtesy of GENERAL MOTORS CORP.
    NOTE: Do not apply engine oil to the bearings or the contact surfaces.
  15. Using vernier calipers, measure the distance between the bearing cap edge and the lower bearing edge.

    Dimension (A - B): 0.5 mm (0.0197 in) or less

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